Key-seating machine.



Patented Aug. 7, I900.

A. n. CAT LIN.

. KEY SEATING MACHINE.

(Application filed May 22, 1899.)

(llo Model.)

|NVENTOR l 1 41% OMww WITNESSES:

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UNIT D STATES PATENT O FIC ABEL n. OATLIN, or CHATTANOOGA, TENNESSEE.

KEY=SEATING MACHINE.

SPECIFICATION forming part of Letters Patent No. 655,432, dated August 7, 1900. :Application filed May 22,1899. Serial No. 717,775. (No model.)

To all whom, it may concern.-

Be it known that I, ABEL D. OATLIN, a citizen of the United States, residing at Chattanooga, in the county of: Hamilton and State of Tennessee, have invented certain new and useful Improvements in Key- Seating Machines; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a key-seating bar for use in that class of machines commonly denominated keyseating machines, the same being used for the purpose of cutting a key seat in various pieces of machinery.

The object of the invention is to promote the ease, accessibility, and convenience of inserting or removingthe cutting tool or implement used in conjunction with the keyseating bar, the same being a very important desideratum in this class of tools or machines where key-seats of different widths are cut, thereby necessitating the changing of the cutters for various widths of the several seats.

The invention consequently consists,essentially, in the construction, arrangement, and combination of parts, substantially as will be hereinafter described and then more fully pointed out in the claims.

In the annexed drawings, illustrating my invention, Figure 1' is a longitudinal sectional elevation of my improved key-seating bar, showing the tool carried thereby and various other cooperative parts. Fig. 2 is a vertical front elevation of the same.

Like letters of reference designate like parts in both figures.

A designates a vertical tubular guide having a vertical longitudinal slot a cut in the wall thereof, as shown in the drawings. Said tubular guide A is attached to the stationary collar M,which is supported by the top of the pedestal or machine-table L, the parts being thus arranged so that the said tubular guide A may be rigidly fastened to the machine. The piece of metal or machinery which is to be operated upon rests or'is clamped upon the top of the machine-table L. The collar M is fastened rigidly to the tube A and is flat on the upper side. The collar that guides the piece to be key-seated is separate and readily fits the, tube. Different collars are used to fit hubs of different sizes that are to be key-seated. --The precise shape and position of the collar M may obviously Vary within wide limits.

Inside of .the tubular guide A is the keyseating bar B, thefsame being vertically reciprocatory therein. At the lower end of bar B is an arm or cross-head (not shown) with suitable mechanismfor driving the same, to which cross-head the lower end of the bar is attached. This bar B is slotted at Z) to provide an inner recess or elongated chamber, wherein is situatedthe cutting tool or implement, of which-that delineated at C in the drawings is an example. At the base of the recess b is a vertical pin 6, securely fastened in the bar B, and surrounding this pin 6 is a spirally-coiled spring E, which bears against the lower end of the'cutting-tool O, the spring having the function of holding the cutter in position. i I

D denotes the horizontal cross-pin passing through the bar B horizon tally near the lower end of the recess 19, and this pin D is engaged by the lower end of the cutter-tool O, which has a vertical slot 0 that is astride of the pin D, as shown in Fig. 1. The tool 0 is of the peculiar pattern illustrated in Fig. 1, where it is shown as having the cutting edge 0 and opposite thereto on the back of the tool the inclined or slightly-curved rear edge 0, there being a forwardly-inclined or diagonal edge 0 that connects the rear edge 0 with the cutting edge 0, so that the upper end of tool 0 thus has a blunt-pointed appearance or form.

The key-seating bar B has a hollow. interior above the recess or slot b; The cutting edge c of the tool or implement, which I have already described, projects through the slot 1) and also through the slot at in the tubular guide A. The two slots 1) and a are substantially in coincidence with each other in order that the cutting portion of the tool may be projected far enough from the axis of the key-seating bar to do its work properly upon the piece that is to be key-seated. 'VVithin the upper end of the key-seating bar, in the hollow interior thereof just mentioned, is a vertically-movable sliding piece F, having an inclined lower face f, so that the piece F is practically of a wedge shape and conforms to a certain degree to the shape of the rear edge 0 of the upper part of the cutter O. The wedgeshaped piece F is slotted, as shown, to receive the lower or T head g of the adj Listing-screw G, which operates to lower or raise the wedge F. It will be obvious that by depressing the wedge F the cutting-tool G will be forced forward, thereby carrying its cutting edge 0 farther from the central axis of the key-seating bar, causing the cutter to so feed or operate that it will cut deeper into the hub or piece of mechanism which is being key-seated.

On the upper end of the feed-screw G is a milled head I, which is adapted to be grasped by the operator and turned for the purpose of driving the screw downwardly and adjusting the wedge-piece F. A cap H, threaded internally, screws upon the upper end of the key seatin g barB, as shown in the drawings. By removing this cap the various mechanical parts constituting my improvements can easily be separated, and by doing this access is had to the interior of the key-seating bar B. A nut J on the screw Gr screws down against the cap H and acts as a jam-nut.

It will from the foregoing explanation of the construction of the various mechanical parts be easily perceived that on the back or upward stroke of the key-seating bar the spiral spring E at the base of the cutting-tool will be compressed, thereby allowing said tool to slip downwardly on the wedge-piece, so that the said tool will not drag in the keyseat which is being cut, and at the end of the upstroke when the tool is released from the pressure thereon the spring will return it to its original position. In increasing the depth of the cutting-tool--that is to say, when it is desired to feed the tool accordingly as the key-' seat is being cut-the mill screw-head I is operated, thereby rotating the feed-screw G and acting upon the wedge F for the purpose of forcing the edge of the cutting-tool forward and enabling it to cut a deeper key-seat in the piece that is being key-seated. In the case of a key-seating bar being used in cutting small key-seats the lower end of this feedscrew may be cut to the same angle as is the rear upper edge of the cutter-tool C, and this will act in the same manner as does the lower edge f of the wedge-shaped piece to press the tool forward to cut a deeper keyway. It may not be amiss, moreover, to repeat here what has been hereinabove suggested, that the piece of machinery to be key-seated is held in position on the tubular guide A byeccentrically-bored collars,which collars are turned taperingly, so as to give draft to the key-seat being cut.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a key-seating machine, the combination with a slotted guide, of a slotted bar working in said guide, a journalsupported in said bar, a cutting-tool, a recess formed in the bottom of the same, said recess adapted to receive the journal,a wedge-block acting against the upper end of the tool, an adj ustiug-screw for said block, and a spring at the lower end of the cutter to normally press the same against the wedge-block, all substantially as set forth.

2. In a key-seating machine, the combination with a slotted guide, of a slotted bar working in said guide, a journal supported in said bar, a cutting-tool, a recess formed in the bottom of the same, said recess adapted to receive the j ournal,a wedge-block acting against the upper end of the tool, an adjusting-screw 

